Determine sequence of modulation frequencies, Electrical Engineering

Assignment Help:

The generator of AM EMFs consists of a battery-driven radiofrequency (RF) EMF generator connected to a 1.5 m long 50 ? coaxial cable, to the other end of which a stainless-steel spoon-shaped mouthpiece is connected via an impedance transformer. The RF source of the device corresponds to a class C amplifier operating at 27.12 MHz. The carrier frequency is AM with a modulation depth of 85±5%, whereas the modulation frequency is generated by a digital direct synthesiser with a resolution of 10-7. The treatment sequence is controlled by a microcontroller (Atmel AT89S8252, Fribourg, Switzerland), that is, duration of session, sequence of modulation frequencies and duration of each sequence can be programmed via PC over a RS232 interface. The RF output is adjusted to 100 mW into a 50 ? load, which results in an emitting power identical to that of the device used for the treatment of insomnia.


Related Discussions:- Determine sequence of modulation frequencies

Determine rc and resistance, Q. A silicon npn BJT is biased by the method s...

Q. A silicon npn BJT is biased by the method shown in Figure, with R E = 240 , R 2 = 3000 , and V CC = 24 V. The operating point corresponds to V BEQ = 0.8V, I BQ = 110 µA,

What is message demodulation, Q. What is Message Demodulation? The majo...

Q. What is Message Demodulation? The major advantage of the conventional (standard) DSB AMsignal transmission is the ease with which the signal can be demodulated. Themessage s

Microcontroller project, hi there, i have to write a program for seven seg...

hi there, i have to write a program for seven segments counter with three buttons to make it counting up and down from 00 to 99 so i''m looking for someone can write it..........th

Explain workinf of colpitts oscillator, Q. Explain workinf of colpitts osci...

Q. Explain workinf of colpitts oscillator? When the collector supply voltage V cc is switched on, the capacitors C1 and Cz are charged. These capacitors C1 and Cz discharge thr

Delay time - power semiconductor devices , Delay time ( t d ) Initiall...

Delay time ( t d ) Initially a thyristor  remains  in forward  blocking  stat when  anode to cathode forward  voltage  is applied  and gate  to cathode circuit is opened. As t

Show the block diagram for a 3-bit ripple counter, Q. (a) For a JKFFwith JK...

Q. (a) For a JKFFwith JK = 11, the output changes on every clock pulse. The change will be coincident with the clock pulse trailing edge and the flip-flop is said to toggle, when T

Dc machince, what ''s part of dcmotor or dc generator

what ''s part of dcmotor or dc generator

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd